Signshine Product Bulletin & Graphic Maintenance Guide

July 2019 – Release V4


Signshine by Stewart Signs is a patented clear coating which, when printed onto normal self-adhesive graphic media, provides a durable clear gloss protective finish. This low surface energy coating is a flexible alternative to a clear laminate because it will apply into recesses and over compound curves. Signshineis used extensively as a protective finish for train exterior and interior graphics applications.


Properties & Characteristics

The Signshine low surface energy finish is resistant to dirt, paint and graffiti which can be cleaned off using water, soap and a proprietary cleaning agent.

The product is print applied at our factory and supplied as an inert dry clear surface varnish.

Atkins Rail has assessed 3M™ graphic material printed with Signshine protection. They report that it stands up well to physical wear, has good chemical resistance and resists airborne contaminants such as iron oxide.


1. Storage

Store unapplied graphics flat in a clean area away from direct sunlight, excessive atmospheric
moisture or humidity.
Store graphics at ambient temperatures less than 38°C (100°F) and a relative humidity of less than 80%. Apply graphics to a substrate within one month

2. Handling

Graphics must be handled carefully during shipment and installation to prevent damage to the face of
the graphic.
Remove Pre-mask Tape before Exposing Graphic to Sunlight
Always remove any pre-mask or application tape from the graphic immediately after application.
Pre-mask tape left on the graphic after application can quickly and permanently adhere to the graphic when exposed to sunlight.

3. Application

Application of graphics must be carried out by approved contractors.
Application over compound surfaces must be evaluated to establish suitable methods on a project by
project basis.
Do not use heat guns or force vinyl into recesses; always feed vinyl in and out of recesses.

4. Cleaning

General cleaning:

Use a mild liquid detergent and water solution and wash the graphic with non-abrasive rag or sponge.

Pressure washing graphics is not recommended and may compromise the graffiti protection resulting in premature graphic failure which will invalidate any warranties offered.

  • Automatic washing equipment may be used but the following needs to be considered:
  • Brushes or flails can catch a loose edge of the graphic and cause further damage to the graphic.
  • Brushes or flails can dull the finish of the graphic.
  • Incorrectly adjusted or unsuitable equipment can scratch, abrade or damage the graphic surface.

Graffiti removal:
To remove most common types of graffiti from protected coated film; apply only approved cleaning products using clean non-abrasive wipe or rag.
Wipe off the surface until graffiti has been removed and then wash the area with water.
In case of stubborn graffiti marks, repeat the procedure.
The use of non-approved cleaning products may compromise the graffiti protection resulting in premature graphic failure.

Always test any cleaning solution/method on a small area first to establish compatibility.

6. Repair

Repairs to damaged graphics must be carried out by approved contractors.

7. Removal

Remove graphics as per base material manufacturer’s instructions.